Hi,

I have a Modbus/TCP operational network. It worked for more than 6 months with no troubles. Last week a NOE 771 01 on one of my PLCs stopped communicating. On its display the signs Fault, Kernel and Appl were marked. I replaced the card with a new one. After a week it happened again on the same PLC. When I tested the card on a test system on my desk it seemed to be ok. What can cause this fault?

 

Same issue... Have you come to a solution? Please share!